Jellybean Posted December 20, 2014 Share Posted December 20, 2014 Hey I had a read of Scotts thread, problem is I dont half a clue what I am doing http://www.mkivsupra.net/vbb/showthread.php?254960-How-to-Re-Shim-Cams I bought Tomei PonCams Do I need to re-shim, why do you need to re-shim? I am not doing it but my mechanic was wondering why I asked him about re-shimming, I just seen other guys suggested it but my mechanic has experience with Tomei Poncams so maybe they are different setup to other brands http://www.tomeiusa.com/_2003web-catalogue/e087_cam_1j_2j.html#early2j http://www.tomeipowered.com/BTE/index.php/2012/04/26/new-adjustable-pulley-for-toyota-1jz-2jz-engines/ ■PRECISION GRINDS ■PRESET VALVE TIMING centerline to 110 degrees ■STABLE IDLING ■BEST BALANCE ■PERFORMANCE THROUGHOUT ■OUTSTANDING TURBO RESPONSE ■STOCK VALVE SPRING COMPATIBLE Quote Link to comment Share on other sites More sharing options...
Mk4Gaz Posted December 20, 2014 Share Posted December 20, 2014 You need to check the shim to lobe clearances, using feeler gauges. If any don't meet the spec from the bgb, you remove the shim and measure it using a micrometer. Then work out how much bigger or smaller the shim would need to be, to be correct. It's a simple job, but time consuming. Toyota sell shims in a huge range of thicknesses, for a few £ each. Just go to your local parts counter armed with the required sizes Quote Link to comment Share on other sites More sharing options...
mclarenross Posted December 20, 2014 Share Posted December 20, 2014 There about £12 each. !! I know, I ended up buying from the states as it was much cheaper. John hodge has loads of my spares, so drop him a msg if you need a few. Quote Link to comment Share on other sites More sharing options...
Scott Posted December 20, 2014 Share Posted December 20, 2014 Every cam is different, your car is shimmed based on the cams installed. When you change the cam, you need to change the shims. The fact your mechanic doesn't know this would worry me on its own. You need to check the shim to lobe clearances, using feeler gauges. If any don't meet the spec from the bgb, you remove the shim and measure it using a micrometer. Then work out how much bigger or smaller the shim would need to be, to be correct. It's a simple job, but time consuming. Toyota sell shims in a huge range of thicknesses, for a few £ each. Just go to your local parts counter armed with the required sizes The shims are actually extortionate for what they are. Approx £10 each IIRC. - - - Updated - - - There about £12 each. !! I know, I ended up buying from the states as it was much cheaper. John hodge has loads of my spares, so drop him a msg if you need a few. Beaten to it lol. I managed to mitigate most of them by swapping them around. It was a bit of a job though Quote Link to comment Share on other sites More sharing options...
Mk4Gaz Posted December 20, 2014 Share Posted December 20, 2014 That's madness! I bought some a few years ago when I did the forged build on my mr2. I'm sure I only paid about £3 each Maybe they've gone up, or my memory is getting worse! Quote Link to comment Share on other sites More sharing options...
Krister Posted December 21, 2014 Share Posted December 21, 2014 You need to check the clearances. Most of the time you only need to swap one or two, but check them once you have everything opened up anyway.. Quote Link to comment Share on other sites More sharing options...
Jellybean Posted December 21, 2014 Author Share Posted December 21, 2014 Cool thanks Quote Link to comment Share on other sites More sharing options...
pedrosixfour Posted December 21, 2014 Share Posted December 21, 2014 With any luck the shims in my old 2JZ-GE are compatible with my 1JZ and there are a few in there of some use if necessary. Quote Link to comment Share on other sites More sharing options...
Jellybean Posted December 21, 2014 Author Share Posted December 21, 2014 With any luck the shims in my old 2JZ-GE are compatible with my 1JZ and there are a few in there of some use if necessary. Yeah , was reading up about it ; 1jz & 2jz are interchangeable http://www.supramania.com/forums/showthread.php?63304-the-quot-how-to-install-cams-quot-guide-(pics) Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted December 22, 2014 Share Posted December 22, 2014 There are alternatives to buying shims, but you need workshop equipment. You can grind thick shims thinner, so long as you don' take so much off as to risk getting through the surface hardening. Not sure how deep that is, so I play it conservatively. You can also grind the valve tips, but it must be done in a fixture to hold them 90 degrees to the (perfect finish) wheel. Converting to MR2 Gen III turbo lightweight buckets and top hat shims is another possibility if you want to play race engines Quote Link to comment Share on other sites More sharing options...
Jellybean Posted December 22, 2014 Author Share Posted December 22, 2014 Thanks Chris! Converting to MR2 Gen III turbo lightweight buckets and top hat shims is another possibility if you want to play race engines sounds interesting! Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted December 22, 2014 Share Posted December 22, 2014 I think it's well documented on the `net. Quote Link to comment Share on other sites More sharing options...
Mk4Gaz Posted December 22, 2014 Share Posted December 22, 2014 As Chris mentions, I've also successfully ground shims down, when it was very minor adjustments needed. From memory, only the top side is hardened, so you grind the underside. Pretty sure I've also heard rumours of 1zz buckets and shims fitting too. I personally prefer the shim over bucket setup, makes it much easier to swap shims if/when necessary. It only becomes necessary to go shim under, when the rev limit is raised Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted December 22, 2014 Share Posted December 22, 2014 Definitely they are hardened both sides or even through hardened. Quote Link to comment Share on other sites More sharing options...
Mk4Gaz Posted December 22, 2014 Share Posted December 22, 2014 Well, I'll admit that they are very hard - took me sodding ages to even take a tiny amount off! I did think that only the top surface was hardened, you could well be right Quote Link to comment Share on other sites More sharing options...
CanisLupus Posted December 22, 2014 Share Posted December 22, 2014 As Chris mentions, I've also successfully ground shims down, when it was very minor adjustments needed. From memory, only the top side is hardened, so you grind the underside. Pretty sure I've also heard rumours of 1zz buckets and shims fitting too. I personally prefer the shim over bucket setup, makes it much easier to swap shims if/when necessary. It only becomes necessary to go shim under, when the rev limit is raised Honestly how much would you want to raise it? We are having Limits around 8500 with the stock buckets and shims. 264 and 272 Cams work fine like that with Stiffer Springs(and if you want retainers). Eventually with bigger cams and even more Revs i'd aggree to the conversion but for most builds its unnecessary. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted December 22, 2014 Share Posted December 22, 2014 Agreed, but if someone likes to extend their knowledge by building a head that's a bit more "racy"it's a viable option to see what the next step is. Personally I wouldn't bother with a relatively slow revver. Quote Link to comment Share on other sites More sharing options...
Jellybean Posted December 22, 2014 Author Share Posted December 22, 2014 Agreed, but if someone likes to extend their knowledge by building a head that's a bit more "racy"it's a viable option to see what the next step is. Personally I wouldn't bother with a relatively slow revver. I just got the book you recommended by Graham Bell Four-stroke Performance Tuning I will have her singing soon! Quote Link to comment Share on other sites More sharing options...
Mk4Gaz Posted December 23, 2014 Share Posted December 23, 2014 Honestly how much would you want to raise it? We are having Limits around 8500 with the stock buckets and shims. 264 and 272 Cams work fine like that with Stiffer Springs(and if you want retainers). Eventually with bigger cams and even more Revs i'd aggree to the conversion but for most builds its unnecessary. Unnecessary? Not sure what you mean bud. If you mean changing to shim under bucket, I'd agree. Quote Link to comment Share on other sites More sharing options...
CanisLupus Posted December 23, 2014 Share Posted December 23, 2014 Yes i was referring to the Bucket conversion Agreed, but if someone likes to extend their knowledge by building a head that's a bit more "racy"it's a viable option to see what the next step is. Personally I wouldn't bother with a relatively slow revver. I'm with you on this Quote Link to comment Share on other sites More sharing options...
Jellybean Posted January 31, 2015 Author Share Posted January 31, 2015 (edited) Anybody recommend where I can get Shims , assorted sizes for when installing the cams Or Just best to measure and buy whats needed? Maybe they are $$$ Are MR2 Gen III turbo lightweight buckets and top hat shims easy to get hold of or $$$ Edited January 31, 2015 by Jellybean (see edit history) Quote Link to comment Share on other sites More sharing options...
CanisLupus Posted January 31, 2015 Share Posted January 31, 2015 Measure and buy what is needed from Toyota Quote Link to comment Share on other sites More sharing options...
Scott Posted January 31, 2015 Share Posted January 31, 2015 Shims are about £10 each. Various members have them but they tend to hold onto them for just such a need. If you're going to MrT then definitely get the sizes you actually need rather than guesswork. Quote Link to comment Share on other sites More sharing options...
CanisLupus Posted January 31, 2015 Share Posted January 31, 2015 Also there might be a chance that you can swap shims around to get the correct clearance so you don't have to buy all of them new. Quote Link to comment Share on other sites More sharing options...
Scott Posted January 31, 2015 Share Posted January 31, 2015 Also there might be a chance that you can swap shims around to get the correct clearance so you don't have to buy all of them new. There's a how to thread on that somewhere Quote Link to comment Share on other sites More sharing options...
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